The pre cat didnt look to be in bad shape but I am no expert on those. Plus I had already busted most of the material out of it. So I replaced the vavle cover and stoped the oil leaking into the back, moved the spark plug a little lower to match the others and for a few days things seemed ok. I also welded the leak shut on the exhuast but found another leak after that. I will be workin g on that today. a few days after making those fixes when siting at a light it felt like it was going to die, and then when the light turned green it just didnt want to go. Sputtered and bogged down pretty bad untill hitting about 15 - 20 mph and then stoped sputtering and drove fine. Every light does this now but not every stop. IF I stop for just a second like at a stop sign it doesnt do this, also the CEL flashes when ever this happens. I am going up to autozone today to get the CEL read. ANy ideas?